Single Output
A-Series, UWR Models
Features
High-Density, 2" x 1"
6 Amp/15 Watt, 1.2-15V
OUT
DC/DC's
Figure 1. Simplifi ed Schematic
The new 1.2, 1.5V, 1.8V and 2.5V models in DATEL's fl agship 7-15 Watt A-Series
can source a continuous 6 Amps. This is the most "low-voltage" current available
from a standard 1" x 2" package, and these power converters exemplify DATEL's
relentless drive to bring you more power/current, from standard packages, without
compromising reliability or resorting to thermal specmanship.
By combining a high-frequency, high-effi ciency (to 88%), synchronous-rectifi er
topology with the newest components and time-tested, fully automated, SMT-on-pcb
construction, these UWR Models are able to bring you 7-15W (@ up to 6A) in the
standard 2" x 1" package from which most competitors can only get 5-10W (@
3-4A). All UWR's deliver their full output power over ambient temperature ranges
from 40
°C to as high as +70°C (model and input voltage dependent) without heat
sinks or supplemental forced-air cooling. Devices derate to +100
°C.
Output voltages are 1,2, 1.5, 1.8, 2, 2.5, 3.3, 5, 12 or 15 Volts. Input voltage
ranges are 10-18V ("D12" models), 18-36V ("D24" models) or 36-75V ("D48")
models. All models feature input pi fi lters, input undervoltage and overvoltage lock-
out, input reverse-polarity protection, output overvoltage protection, output current
limiting, and continuous short-circuit protection. On/off control and output-trim func-
tions are optional (see Optional Functions). All models are certifi ed to IEC950,
UL1950 and EN60950 safety requirements. "D48" models (36-75V inputs) are CE
marked.
UWR 7-15W DC/DC's are packaged in low-cost, light-weight, diallyl phthalate
(UL94V-0 rated) plastic packages with standoffs. EMC compliance is achieved via a
A - S E R I E S
INNOVATION and EX C ELL E N C E
®
®
COMMON
(6)
+V
IN
(1)
V
IN
(2)
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
COMPARATORS
UVLO & OVLO
ON/OFF
CONTROL
(3)
(OPTIONAL)
TRIM
(5)
(OPTIONAL)
+V
OUT
(4)
SWITCH
CONTROL
1.2-2.5V
OUT
models source 6 Amps
3.3V
OUT
models source 4.25 Amps
5/12/15V
OUT
models deliver full 15 Watts
Synchronous-rectifi er topologies
Guaranteed effi ciencies to 88%
Choice of 3 input voltage ranges:
10-18V, 18-36V, 36-75V
40 to +60/70
°C ambient w/o derating
Fully isolated (1500Vdc); I/O protected
UL1950/EN60950 certifi ed
CE mark (75V
IN
models)
Standard 2" x 1" packages and pinouts
Optional V
OUT
trim and on/off control
Pin compatible with Lucent LC/LW Series
1.2 to 5V-output models use the synchronous-rectifi er confi guration shown above.
12V and 15V-output models employ a standard forward architecture.
DATEL, Inc., Mansfi eld, MA 02048 (USA) · Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 · Email: sales@datel.com · Internet: www.datel.com
A Series
7 - 1 5 W , S I N G L E O U T P U T D C / D C C O N V E R T E R S
UWR-1.2/6000-D12A 1.2 6000 30 55 ±0.1% ±0.5% 12 10-18 85/914 TBD 78% C14, P22
UWR-1.2/6000-D24A 1.2 6000 30 55 ±0.1% ±0.5% 24 18-36 50/454 TBD 79% C14, P22
UWR-1.2/6000-D48A 1.2 6000 30 55 ±0.1% ±0.5% 48 36-75 40/226 TBD 80% C14, P22
UWR-1.5/6000-D12A 1.5 6000 30 55 ±0.1% ±0.5% 12 10-18 75/914 77.5% 79.5% C14, P22
UWR-1.5/6000-D24A 1.5 6000 30 55 ±0.1% ±0.5% 24 18-36 40/454 78% 80% C14, P22
UWR-1.5/6000-D48A 1.5 6000 30 55 ±0.1% ±0.5% 48 36-75 25/226 78.5% 80.5% C14, P22
UWR-1.8/6000-D12A 1.8 6000 30 55 ±0.1% ±0.5% 12 10-18 70/1084 81% 83% C14, P22
UWR-1.8/6000-D24A 1.8 6000 30 55 ±0.1% ±0.5% 24 18-36 35/539 82.5% 84.5% C14, P22
UWR-1.8/6000-D48A 1.8 6000 30 55 ±0.1% ±0.5% 48 36-75 25/268 83% 85% C14, P22
UWR-2/6000-D12A 2 6000 30 55 ±0.1% ±0.5% 12 10-18 80/1176 83% 85% C14, P22
UWR-2/6000-D24A 2 6000 30 55 ±0.1% ±0.5% 24 18-36 55/588 83% 85% C14, P22
UWR-2/6000-D48A 2 6000 30 55 ±0.1% ±0.5% 48 36-75 25/291 84% 86% C14, P22
UWR-2.5/6000-D12A 2.5 6000 30 55 ±0.1% ±0.5% 12 10-18 80/1489 83% 86% C14, P22
UWR-2.5/6000-D24A 2.5 6000 30 55 ±0.1% ±0.5% 24 18-36 55/740 83% 85% C14, P22
UWR-2.5/6000-D48A 2.5 6000 30 55 ±0.1% ±0.5% 48 36-75 25/367 84% 86% C14, P22
UWR-3.3/4250-D12A 3.3 4250 85 100 ±0.2% ±0.5% 12 10-18 80/1375 83% 86% C14, P22
UWR-3.3/4250-D24A 3.3 4250 85 100 ±0.2% ±0.5% 24 18-36 45/672 84.5% 87% C14, P22
UWR-3.3/4250-D48A 3.3 4250 85 100 ±0.2% ±0.5% 48 36-75 35/336 85% 87% C14, P22
UWR-5/3000-D12A 5 3000 85 100 ±0.2% ±0.3% 12 10-18 110/1471 83% 85% C14, P22
UWR-5/3000-D24A 5 3000 85 100 ±0.2% ±0.3% 24 18-36 55/710 85.5% 88% C14, P22
UWR-5/3000-D48A 5 3000 85 100 ±0.2% ±0.3% 48 36-75 35/355 85.5% 88% C14, P22
UWR-12/1250-D12A 12 1250 85 100 ±0.2% ±0.3% 12 10-18 45/1471 82.5% 85% C14, P22
UWR-12/1250-D24A 12 1250 85 100 ±0.2% ±0.3% 24 18-36 45/718 85% 87% C14, P22
UWR-12/1250-D48A 12 1250 85 100 ±0.2% ±0.3% 48 36-75 20/359 85% 87% C14, P22
UWR-15/1000-D12A 15 1000 85 100 ±0.2% ±0.3% 12 10-18 45/1471 82.5% 85% C14, P22
UWR-15/1000-D24A 15 1000 85 100 ±0.2% ±0.3% 24 18-36 45/718 85% 87% C14, P22
UWR-15/1000-D48A 15 1000 85 100 ±0.2% ±0.3% 48 36-75 20/359 85% 87% C14, P22
R/N (mVp-p) Regulation
(Max.)
Effi ciency
Package
V
OUT
I
OUT
V
IN
Nom.
Range
I
IN
(Case,
Model
(Volts)
(mA)
Typ. Max.
Line Load
(Volts) (Volts) (mA) Min. Typ. Pinout)
2
Performance Specifi cations and Ordering Guide
Typical at T
A
= +25°C under nominal line voltage and full-load conditions, unless otherwise noted.
Ripple/Noise (R/N) is tested/speciifed over a 20MHz bandwidth. All models are specifi ed with two
external 0.47µF multi-layer ceramic capacitors located 2-3 inches from the module being tested.
Wide Range Input
Output Confi guration:
U = Unipolar
Nominal Output Voltage:
1.2, 1.5, 1.8, 2, 2.5, 3.3, 5, 12 or 15 Volts
Maximum Output Current
in mA
Input Voltage Range:
D12 = 10-18 Volts (12V nominal)
D24 = 18-36 Volts (24V nominal)
D48 = 36-75 Volts (48V nominal)
U WR
3000
-
/
D48 A
-
5
* Pins 3 and 5 are optional.
See Optional Functions and
Technical Notes for details.
CT
A-Series
High Reliability
Optional Functions
See Last Page
Output
Input
P A R T N U M B E R S T R U C T U R E
M E C H A N I C A L S P E C I F I C A T I O N S
Pin
Function P22
Pin
Function P22
1
+Input
4
+Output
2
Input
5
Trim*
3 On/Off
Control*
6
Common
I/O Connections
Load regulation is specifi ed over 10%-100% load conditions. 1.5-5V models are stable and
regulate under no-load conditions. 12/15V models have minimum loading requirements.
See Performance/Functional Specifi cations.
Nominal line voltage, no-load/full-load conditions.
PRELIMINAR
Y
Case C14
1
2
4
5
6
PLASTIC CASE
STANDOFF
0.020 (0.51)
3
1.00
(25.40)
2.00
(50.80)
0.20 MIN
(5.08)
0.400
(10.16)
0.800
(20.32)
0.800
(20.32)
0.60
(15.24)
0.49
(12.45)
0.040 ±0.002 DIA.
(1.016 ±0.051)
BOTTOM VIEW
0.200
(5.08)
0.100
(2.54)
0.10
(2.54)
DIMENSION ARE IN INCHES (MM)
LX
UWR Models
7 - 1 5 W , S I N G L E O U T P U T D C / D C C O N V E R T E R S
Dynamic Characteristics (continued)
Switching Frequency
1.2V and 2V models TBD
1.5V D48 models 260kHz (±30kHz)
1.8V D12 models 280kHz (±30kHz)
1.8V D24 models 250kHz (±30kHz)
1.8V D48 models 210kHz (±20kHz)
2.5 and 1.5 D12/D24 models 340kHz (±40kHz)
3.3-12V models 310kHz (±30kHz)
Environmental
Operating Temperature (Ambient):
Without Derating
40 to +60/70°C
With Derating to +100°C (See Derating Curves)
Case Temperature:
Maximum Allowable +100°C
Storage Temperature 40 to +105°C
Physical
Dimensions 2" x 1" x 0.49" (51 x 25 x 12.45mm)
Shielding None
Case Material Diallyl phthalate, UL94V-0 rated
Pin Material Brass, solder coated
Weight 1.4 ounces (39.7 grams)
3
Performance/Functional Specifi cations
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions, unless noted.
Input Voltage:
Continuous:
D12 Models 22 Volts
D24 Models 44 Volts
D48 Models 88 Volts
Transient (100msec):
D12 Models 50 Volts
D24 Models 50 Volts
D48 Models 100 Volts
Input Reverse-Polarity Protection Current must be <10 Amps. Brief
duration only. Fusing recommended.
Output Overvoltage Protection:
1.2V/1.5/1.8V Outputs 2.1/2.2/2.3 Volts, unlimited duration
2V/2.5V/3.3V Outputs TBD/3.4/4.4 Volts, unlimited duration
5V/12V/15V Outputs 7.1/16/18 Volts, unlimited duration
Output Current Current limited. Devices can
withstand sustained output short
circuits without damage.
Case Temperature +100°C
Storage Temperature 40 to +105°C
Lead Temperature (soldering, 10 sec.) +300°C
These are stress ratings. Exposure of devices to any of these conditions may adversely
affect long-term reliability. Proper operation under conditions other than those listed in the
Performance/Functional Specifi cations Table is not implied.
Absolute Maximum Ratings
Input
Input Voltage Range:
D12A Models 10-18 Volts (12V nominal)
D24A Models 18-36 Volts (24V nominal)
D48A Models 36-75 Volts (48V nominal)
Overvoltage Shutdown:
D12A Models 18.5-21 Volts (20V typical)
D24A Models 37-41 Volts (38V typical)
D48A Models 77-81 Volts (78.5V typical)
Start-Up Threshold:
D12A Models 9.4-10 Volts (9.6V typical)
D24A Models 16.5-18 Volts (17V typical)
D48A Models 34-36 Volts (35V typical)
Undervoltage Shutdown:
D12A Models 7-8.5 Volts (8V typical)
D24A Models 15.5-17.5 Volts (16.5V typical)
D48A Models 32.5-35.5 Volts (34V typical)
Input Current:
Normal Operating Conditions See Ordering Guide
Standby Mode (Off, OV, UV) 5mA
Input Filter Type Pi
Reverse-Polarity Protection Brief duration, 10A maximum
On/Off Control (Optional, Pin 3):
D12AC, D24AC, & D48AC Models On = open or 13V to +V
IN
, I
IN
= 50µA max.
Off = 0-0.8V, I
IN
= 1mA max.
D12AN, D24AN, & D48AN Models On = 0-0.8V, I
IN
= 2.6mA max.
Off = open or 3.3-5.5V, I
IN
= 1mA max.
Output
V
OUT
Accuracy (50% load): ±1.5%, maximum
Minimum Loading for Specifi cation:
1.2V/1.5V/1.8V/2.5V/3.3V/5V Outputs No load
12V/15V
Outputs 10% of I
OUT
max.
Minimum Loading for Stability:
1.2V/1.5V/1.8V/2.5V/3.3V/5V Outputs No load
12V/15V
Outputs 25mA
Ripple/Noise (20MHz BW)
See Ordering Guide
Line/Load Regulation See Ordering Guide
Effi ciency See Ordering Guide
Isolation Voltage:
Input-to-Output 1500Vdc minimum (functional)
Isolation Capacitance 470pF
Isolation Resistance 100M
Current Limiting:
1.2V-5V Outputs Hiccup technique, auto-recovery
12V and 15V
Outputs Power-limiting technique, auto-recovery
Overvoltage Protection Zener/transorb clamp, magnetic feedback
Temperature Coeffi cient ±0.04% per °C
Dynamic Characteristics
Transient Response (50% load step)
1.2V-2.5V models 200µsec max. to ±2% of fi nal value
3.3V-15V models 200µsec max. to ±1.5% of fi nal value
Start-Up Time:
V
IN
to V
OUT
50msec
On/Off to V
OUT
30msec
All models are specifi ed with two external 0.47µF multi-layer ceramic capacitors installed
across their output pins.
See Minimum Output Loading Requirements under Technical Notes.
See Technical Notes for details.
The On/Off Control and Trim functions are optional and must be installed by DATEL.
See Optional Functions or contact DATEL for details.
The On/Off Control is designed to be driven with open-collector logic or the application of
appropriate voltages (referenced to Input, pin 2). Applying a voltage to the On/Off Control
pin when no input voltage is applied to the converter may cause permanent damage.
See Technical Notes.
Output noise maybe further reduced with the addition of additional external output
capacitors. See Technical Notes.
Operating temperature range without derating is model and input-voltage dependent.
See Temperature Derating.
A Series
7 - 1 5 W , S I N G L E O U T P U T D C / D C C O N V E R T E R S
4
Trimming Output Voltages
These converters have a trim capability (pin 5) that allows users to adjust the
output voltage ±5%. Adjustments to the output voltage can be accomplished
via a trim pot, Figure 2, or a single fi xed resistor as shown in Figures 3 and 4.
A single fi xed resistor can increase or decrease the output voltage depending
on its connection. Fixed resistors should have an absolute TCR less than
100ppm/°C to minimize sensitivity to changes in temperature.
A single resistor connected from the Trim (pin 5) to the +Output (pin 4), see
Figure 3, will decrease the output voltage. A resistor connected from the Trim
(pin 5) to Output Common (pin 6) will increase the output voltage.
Trim adjustment greater than 5% can have an adverse effect on the convert-
er's performance and is not recommended.
20k
5-22
Turns
+INPUT
+OUTPUT
COMMON
TRIM
INPUT
ON/OFF
CONTROL
1
2
3
4
5
LOAD
6
+INPUT
+OUTPUT
COMMON
TRIM
INPUT
ON/OFF
CONTROL
1
2
3
4
5
LOAD
6
R
TRIM DOWN
+INPUT
+OUTPUT
COMMON
TRIM
INPUT
ON/OFF
CONTROL
1
2
3
4
5
LOAD
6
R
TRIM UP
Figure 2. Trim Connections Using A Trim Pot
Figure 4. Trim Connections To Increase Output Voltage Using Fixed Resistors
Figure 3. Trim Connections To Decrease Output Voltage Using Fixed Resistors
T E C H N I C A L N O T E S
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "fl oating."
Designers will usually use the output Common (pin 6) as the ground/return of
the load circuit. You can, however, use the +Output (pin 4) as ground/return to
effectively reverse the output polarity.
Minimum Output Loading Requirements
1.2 to 5V models employ a synchronous-rectifi er design topology. All models
regulate within spec and are stable under no-load conditions. 12/15V models
employ a traditional forward architecture and require 10% loading (125mA for
12V models, 100mA for 15V models) to achieve their listed regulation specs.
12/15V models also have a minimum-load-for-stability requirement (25mA).
For 12/15V models, operation between 25mA and 10% loading will result
in stable operation but regulation may degrade. Operation under no-load
conditions will not damage the 12/15V devices; however they may not meet
all listed specifi cations.
Filtering and Noise Reduction
All A-Series UWR DC/DC Converters achieve their rated ripple and noise
specifi cations using the external input and output capacitors specifi ed in
the Performance/Functional Specifi cations table. In critical applications, input/
output noise may be further reduced by installing additional external I/O caps.
Input capacitors should be selected for bulk capacitance, low ESR and high
rms-ripple-current ratings. Output capacitors should be selected for low ESR
and appropriate frequency response. All caps should have appropriate volt-
age ratings and be mounted 2-3 inches from the converter to achieve
published ratings.
The most effective combination of external I/O capacitors will be a function
of your particular load and layout conditions. Our Applications Engineers will
be happy to recommend potential solutions and can discuss the possibility of
our modifying a given device's internal fi ltering to meet your specifi c require-
ments. Contact our Applications Engineering Group for additional details.
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. Fuses should also be
used if the possibility of sustained, non-current-limited, input-voltage polarity
reversals exists. For DATEL A-Series UWR 7-15 Watt DC/DC Converters, you
should use slow-blow type fuses with values no greater than the following.
V
IN
Range Fuse Value
"D12A" Models 3 Amps
"D24A" Models 2 Amps
"D48A" Models 1 Amp
UWR Models
7 - 1 5 W , S I N G L E O U T P U T D C / D C C O N V E R T E R S
Accuracy of adjustment is subject to tolerances or resistor values
and factory-adjusted output accuracy.
V
O
= desired output voltage.
Model
Trim
Equation
Start-Up Threshold and Undervoltage Shutdown
Under normal start-up conditions, devices will not begin to regulate until the
ramping-up input voltage exceeds the Start-Up Threshold Voltage (35V for
"D48A" models). Once operating, devices will not turn off until the input volt-
age drops below the Undervoltage Shutdown/Lockout limit (34V for "D48A"
models). Subsequent re-start will not occur until the input is brought back
up to the Start-Up Threshold. This built-in hysteresis obviously avoids any
indeterminate on/off situations at a single voltage.
Start-Up Time
The V
IN
to V
OUT
Start-Up Time is the interval between the time at which
a ramping input voltage crosses the turn-on threshold point and the fully-
loaded output voltage enters and remains within its specifi ed accuracy band.
Actual measured times will vary with input source impedance, external input
capacitance, and the slew rate and fi nal value of the input voltage as it
appears to the converter.
The On/Off to V
OUT
Start-Up Time assumes the converter is turned off via
the On/Off Control with the nominal input voltage already applied to the
converter. The specifi cation defi nes the interval between the time at which the
converter is turned on and the fully-loaded output voltage enters and remains
within its specifi ed accuracy band.
16.9
DOWN
R
T
(k
) =
3.3 V
O
2.49(V
O
1.27)
UWR-3.3/4250-D12A
UWR-3.3/4250-D24A
UWR-3.3/4250-D48A
16.9
UP
R
T
(k
) =
V
O
3.3
3.16
15
DOWN
R
T
(k
) =
5 V
O
2.49(V
O
2.527)
UWR-5/3000-D12A
UWR-5/3000-D24A
UWR-5/3000-D48A
15
UP
R
T
(k
) =
V
O
5
6.292
2
DOWN
R
T
(k
) =
1.5 V
O
1.6(V
O
1.23)
UWR-1.5/6000-D12A
UWR-1.5/6000-D24A
UWR-1.5/6000-D48A
2
UP
R
T
(k
) =
V
O
1.5
1.968
2.49
DOWN
R
T
(k
) =
1.8 V
O
0.995(V
O
1.24)
UWR-1.8/6000-D12A
UWR-1.8/6000-D24A
UWR-1.8/6000-D48A
2.49
UP
R
T
(k
) =
V
O
1.8
1.23
11
DOWN
R
T
(k
) =
2.5 V
O
2(V
O
1.24)
UWR-2.5/6000-D12A
UWR-2.5/6000-D24A
UWR-2.5/6000-D48A
11
UP
R
T
(k
) =
V
O
2.5
2.48
49.9
DOWN
R
T
(k
) =
12 V
O
6.34(V
O
5.714)
UWR-12/1250-D12A
UWR-12/1250-D24A
UWR-12/1250-D48A
49.9
UP
R
T
(k
) =
V
O
12
36.23
63.4
DOWN
R
T
(k
) =
15 V
O
7.87(V
O
7.136)
2
DOWN
R
T
(k
) =
1.2 V
O
1.62(V
O
0.9)
UWR-1.2/6000-D12A
UWR-1.2/6000-D24A
UWR-1.2/6000-D48A
2
UP
R
T
(k
) =
V
O
1.2
1.458
UWR-15/1000-D12A
UWR-15/1000-D24A
UWR-15/1000-D48A
63.4
UP
R
T
(k
) =
V
O
15
56.16
5
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